EP0229744B1 - Systèmes vis écrou à rouleaux - Google Patents

Systèmes vis écrou à rouleaux Download PDF

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Publication number
EP0229744B1
EP0229744B1 EP87810011A EP87810011A EP0229744B1 EP 0229744 B1 EP0229744 B1 EP 0229744B1 EP 87810011 A EP87810011 A EP 87810011A EP 87810011 A EP87810011 A EP 87810011A EP 0229744 B1 EP0229744 B1 EP 0229744B1
Authority
EP
European Patent Office
Prior art keywords
roller
spindle
satellite
driving gear
bearing discs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87810011A
Other languages
German (de)
English (en)
Other versions
EP0229744A1 (fr
Inventor
Urs Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GSA AG
Original Assignee
GSA AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GSA AG filed Critical GSA AG
Priority to AT87810011T priority Critical patent/ATE54199T1/de
Publication of EP0229744A1 publication Critical patent/EP0229744A1/fr
Application granted granted Critical
Publication of EP0229744B1 publication Critical patent/EP0229744B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • F16H25/2252—Planetary rollers between nut and screw

Definitions

  • the present invention relates to a roller-screw drive according to the preamble of patent claim 1.
  • Roller screw drives with a centrally arranged threaded spindle, around which are evenly distributed satellites, which engage both with the spindle and with an external, internally toothed nut, are known and are partly on the market as roller or Planetary spindles.
  • the satellites on the one hand are engaged over their entire length with their thread with the thread of the centrally arranged spindle and on the other hand with the thread of the nut arranged around the outside, all parts have to be worked extremely precisely so that the two can get through the interventions spindle / satellite and satellite / mother resulting translations are as identical as possible on all satellites, because even small deviations can lead to the destruction or jamming of the drives.
  • Satellite drives only for small powers to be transmitted and for relatively few revolutions of the spindle. With high forces to be transmitted and many spindle rotations, such high forces build up in the individual operations that the threads are destroyed. This is understandable when you consider that a deviation of the pitch circle diameter of only 1/100 mm per hundred revolutions of a satellite causes a rolling error of 3.14 mm, which cannot be compensated due to the fixed positioning of the satellites.
  • the present invention is therefore based on the object of building a roller-screw drive which does not have any of the disadvantages of the known screw-type satellite drives and is nevertheless constructed in a structurally simple manner and does not require a precision which is practically impossible to achieve in order to be practical function and can also be implemented for steep inclines.
  • a spindle 1 having a thread with a pitch, around which axially parallel satellite rollers 2 are arranged, which also carry threads with a pitch.
  • the pins 3 of the satellite rollers 2 are mounted in bearing disks 4, 4 'connected by means of driver supports 6 to form a cage 9.
  • a nut 5 carrying an internal thread is arranged on the outside around the satellite rollers 2.
  • the latter can advantageously be provided with a preload ring 7 and a spring key 8.
  • This is advantageously closed on both sides by Seeger L-rings 10 and 10 ', to which thrust washers 11, 11' can be connected on the inside.
  • they are advantageously positioned by means of spacer rings 12, 12'.
  • the satellite rollers 2 Since, as mentioned above, it is practically impossible to find all satellite rollers 2 which are identical in terms of pitch circle diameter in such a roller screw drive, these must be given the opportunity to compensate for the inevitable passing differences.
  • the satellite rollers 2 since the satellite rollers 2 are positioned by means of their pins 3 in the cage 9, or respectively the bearing disks 4, 4 'with respect to their relative position around the spindle 1 and therefore cannot move sideways, the rolling error of each satellite roller 2 can only by a relative movement along the respective satellite axis of rotation X ', which, as mentioned, is parallel to the spindle axis X.
  • the satellite rollers 2 are rotatably supported with longitudinal play in the bearing disks 4, 4 ' .
  • This longitudinal play can be ensured in various ways according to the invention. Either, as in the embodiment variant shown, in that balls 13, 13 'are arranged between the two pins 3 and the bearing disks 4, 4', via which the pins 3 can press against the bearing disk 4 or 4 'assigned to them if the satellite Roll 2 has to dodge in the longitudinal direction due to a rolling error compared to the other satellite rolls 2. It is advantageous for the driver supports 6, which are advantageously flat if by means of pins 14 in the bearing disks 4, 4 'are not immovably connected to the latter, so that when predetermined longitudinal pressures occur, the bearing disks 4, 4' can be pressed apart.
  • the maximum longitudinal compensation of the rolling errors in the course of the complete passage of the roller-screw drive pushes the bearing disks 4, 4 ' apart, after which no further displacement of the same must be expected, since the satellite rollers 2 are always in again return to their starting positions. If the machining precision of the satellite rollers 2 is known, the largest expected longitudinal movement of the satellite rollers 2 can be calculated therefrom, which can occur from one stop to the other when the roller-screw drive is turned. From this, the length of the spacer rings 12, 12 ' , respectively. determine the longitudinal play to be provided between these and the bearing disks 4, 4 ' .
  • the balls 13, 13 ' serve to reduce the friction between the journal 3 and the bearing washers 4, 4 ' during the extreme positions of the satellite rollers 2 and during the first full pass, on the occasion of which the bearing washers 4 , 4 'are pushed apart.
  • the balls 13, 13 ' may be missing, in particular if the distance between the bearing disks 4, 4' is advantageously chosen from the outset such that the satellite rollers 2 are sufficient Have longitudinal play.
  • the satellite rollers 2 when mounting the roller screw drive, respectively. the first time the assembled cage 9 is placed, all are held in one end position, so that for each satellite reel 2 with a larger pitch circle diameter than the smallest, or vice versa, each satellite reel 2 with a smaller pitch circle diameter than the largest, in the predetermined one Can dodge the longitudinal direction when the cage 9 is rotated from one end of the spindle 1 to the other.
  • a further advantageous embodiment of the roller-screw drive according to the invention is that the satellite rollers 2 are spring-loaded into the cage 9 on one side, so that when the cage 9 is placed on the spindle 1, all the satellite rollers 2 assume the same end position, such that the predetermined longitudinal play, as described above, is again available to each satellite roll 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Rolling Contact Bearings (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (6)

1. Système vis-écrou à rouleaux comportant une fusée centrale (1) et un écrou (5) situé à l'extérieur, ainsi que des rouleaux-satellites (2) montés dans une cage (9) pourvue de deux bagues d'appui (4, 4') au moyen de leurs tenons d'extrémité (3), dont les axes sont parallèles à la fusée, qui sont disposés tout autour de celle-ci et sont engrénés avec elle ainsi qu'avec une denture intérieure de l'écrou (5), caractérisé en ce qu'il est prévu des moyens permettant à chaque rouleau-satellite (2) d'exécuter un déplacement relatif prédéterminé le long de son axe longitudinal (x') et en ce que les rouleaux-satellites (2) présentent entre les tenons (3) des filets avec un pas, qui se trouvent en permanence en prise avec un filetage extérieur de la fusée (1) correspondant ainsi qu'avec un filetage intérieur correspondant de l'écrou (5).
2. Système vis-écrou à rouleaux selon la revendication 1, caractérisé en ce que lesdits moyens sont constitués par des appuis d'entraînement (6) reliés avec possibilité de déplacement longitudinal aux bagues d'appui (4, 4'), qui maintiennent ensemble les bagues d'appui (4, 4') sous forme d'une cage (9) rigide en torsion.
3. Système vis-écrou à rouleaux selon la revendication 2, caractérisé en ce que les moyens comprennent en outre des billes (3), qui transmettent aux bagues d'appui (4, 4') les poussées exercées en direction axiale par les rouleaux-satellites (2) aux bagues d'appui (4, 4').
4. Système vis-écrou à rouleaux selon la revendication 1, caractérisé en ce que les moyens sont constitués par des yeux longitudinaux prédéterminés des rouleaux-satellites (2) dans la cage (9), entre les bagues d'appui (4, 4').
5. Système vis-écrou à rouleaux selon la revendication 4, caractérisé en ce que les moyens présentent entre un réseau combiné avec un liquide, qui relie ensemble tous les points d'appui des rouleaux-satellites (2) dans les bagues d'appui (4, 4') de telle sorte que les poussées longitudinales exercées sur les divers points d'appui sont réparties régulièrement sur tous les rouleaux-satellites (2).
6. Système vis-écrou à rouleaux selon la revendication 2, caractérisé en ce que les moyens sont constitués par des ressorts qui soumettent d'un côté les rouleaux-satellites (2) à la charge d'un ressort dans les bagues d'appui (4, 4'), de manière telle qu'avant la mise en place de la cage (9) sur la fusée (1), ils se trouvent tous dans une même position axiale finale.
EP87810011A 1986-01-08 1987-01-08 Systèmes vis écrou à rouleaux Expired - Lifetime EP0229744B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810011T ATE54199T1 (de) 1986-01-08 1987-01-08 Verbesserter rollen-gewinde-trieb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH31/86 1986-01-08
CH31/86A CH669436A5 (fr) 1986-01-08 1986-01-08

Publications (2)

Publication Number Publication Date
EP0229744A1 EP0229744A1 (fr) 1987-07-22
EP0229744B1 true EP0229744B1 (fr) 1990-06-27

Family

ID=4177785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810011A Expired - Lifetime EP0229744B1 (fr) 1986-01-08 1987-01-08 Systèmes vis écrou à rouleaux

Country Status (4)

Country Link
EP (1) EP0229744B1 (fr)
AT (1) ATE54199T1 (fr)
CH (1) CH669436A5 (fr)
DE (1) DE3763451D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646351A1 (de) * 1996-11-09 1998-05-14 Schaeffler Waelzlager Ohg Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung
DE19919566A1 (de) * 1999-04-29 2000-11-02 Schaeffler Waelzlager Ohg Vorrichtung zur Umwandlung einer Drehbewegung in eine geradlinige Bewegung
DE102018116867A1 (de) * 2018-07-12 2020-01-16 Schaeffler Technologies AG & Co. KG Elektromechanischer Aktuator und Hinterachslenkung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112785A1 (de) * 1970-03-17 1971-11-18 Heidenstam Erik Johann Von Dip Rollengeraet
SE346367B (fr) * 1970-10-14 1972-07-03 Skf Ind Trading & Dev
SE357241B (fr) * 1972-04-25 1973-06-18 Skf Ind Trading & Dev
CH637736A5 (fr) * 1980-10-09 1983-08-15 Rollvis Sa Dispositif de roulement a rouleaux fonctionnant comme vis et ecrou.

Also Published As

Publication number Publication date
EP0229744A1 (fr) 1987-07-22
CH669436A5 (fr) 1989-03-15
ATE54199T1 (de) 1990-07-15
DE3763451D1 (de) 1990-08-02

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